Special Charges, Net - Special Charges (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Special charges, net
Employee termination costs		$ 1.0	$ 1.0	$ 0.5
Other cash costs, net		0.0	1.0	0.0
Non-cash asset write-downs	$ 5.7	0.0	0.4	0.5
Total Special Charges		1.0	2.4	1.5
Operating Segments | HVAC reportable segment
Special charges, net
Other cash costs, net		0.0	0.0	0.0
Non-cash asset write-downs		0.0	0.0	0.5
Total Special Charges		0.1	0.5	1.3
Operating Segments | Detection and Measurement reportable segment
Special charges, net
Other cash costs, net		0.0	0.0	0.0
Non-cash asset write-downs		0.0	0.0	0.0
Total Special Charges		0.9	0.3	0.0
General corporate
Special charges, net
Other cash costs, net			1.0	0.0
Non-cash asset write-downs		0.0	0.4	0.0
Total Special Charges			1.6	0.2
Employee Termination Costs
Special charges, net
Employee termination costs		1.0	1.0	0.5
Employee Termination Costs | Operating Segments | HVAC reportable segment
Special charges, net
Employee termination costs		0.1	0.5	0.3
Employee Termination Costs | Operating Segments | Detection and Measurement reportable segment
Special charges, net
Employee termination costs		0.9	0.3	0.0
Employee Termination Costs | General corporate
Special charges, net
Employee termination costs			0.2	0.2
Facility Consolidation Costs
Special charges, net
Facility consolidation costs		0.0	0.0	0.5
Facility Consolidation Costs | Operating Segments | HVAC reportable segment
Special charges, net
Facility consolidation costs		0.0	0.0	0.5
Facility Consolidation Costs | Operating Segments | Detection and Measurement reportable segment
Special charges, net
Facility consolidation costs		0.0	0.0	0.0
Facility Consolidation Costs | General corporate
Special charges, net
Facility consolidation costs		$ 0.0	$ 0.0	$ 0.0